pairwise comparisons among treatments

-----Original Message-----
From: r-help-bounces at stat.math.ethz.ch 
[mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of kevin Lin
Sent: Monday, September 19, 2005 2:33 PM
To: r-help at stat.math.ethz.ch
Subject: [R] pairwise comparisons among treatments

Hello R listing,

I did two-way anova on lm. Further question the investigator 
interested in is what two treatments are different?

I am looking for a command which could do pairwise comparison for 
every treatment.

Could anyone help me out?

Thanks a bunch

Kevin